Ouette gyrus, Tong & Li, 2007

Tong, Yanfeng & Li, Shuqiang, 2007, First Records Of The Family Ochyroceratidae (Arachnida: Araneae) From China, With Descriptions Of A New Genus And Eight New Species, Raffles Bulletin of Zoology 55 (1), pp. 63-76 : 69

Ouette gyrus , new species

( Figs. 5A–H , 10 )

Material examined. – Holotype: male ( IZCAS), Yalong Cave (18 ° 59'N 108 ° 53'E), Yalong Village, Donghe Town, Dongfang City, Hainan Island, China, coll. Y. Song, X. Han, and Y. Tong, 1 Apr.2005.

Paratypes: 4 males and 17 females ( IZCAS), same data as holotype .

Diagnosis. – The new species is similar in male palp to the species of the genus Speocera , but the posteriorly shifted copulatory openings (from the epigastric furrow) suggested that it is a member of the genus Ouette , and it can be distinguished from O. ouette Saaristo, 1998 , by the different shapes of chitinous ducts.

Description. – Males: Total length 0.86–0.94. Carapace 0.48– 0.51 long, 0.40–0.42 wide; abdomen 0.37–0.48 long, 0.28– 0.33 wide. The whole body pale. Pattern of carapace as the female, but paler. Sternum without radiating streaks, abdomen nearly white. Chelicerae slightly compressed anteroposteriorly. Chaetotaxy: tibia III with 1 strong prolateral and 2 small retrolateral spines, tiba IV with 2 prolateral and 3–4 retrolateral spines, metatarsus IV with 1 prolateral and 2 retrolateral spines. Leg measurements: I 1.83 (0.56, 0.15, 0.52, 0.36, 0.24); II 1.65 (0.51, 0.15, 0.44, 0.32, 0.23); III 1.43 (0.42, 0.14, 0.35, 0.31, 0.21); IV 1.94 (0.58, 0.14, 0.56, 0.41, 0.25). Leg formula: 4 1 2 3. Palp measurements: 0.61 (0.21, 0.09, 0.15, 0.16), bulb 0.13 long, 0.15 wide. Palpal tibia incrassate, as long as tarsi, the latter tip obtusely.

Females: Total length 1.01–1.06. Carapace 0.50–0.52 long, 0.40–0.42 wide; abdomen 0.52–0.62 long, 0.40–0.44 wide. Body color pale yellow, darker than the male. Abdomen brown violet, with streaks on posterior and lateral area. Chelicerae unmodified. Leg measurements: I 1.74 (0.52, 0.15, 0.50, 0.34, 0.23); II 1.59 (0.46, 0.15, 0.43, 0.32, 0.23); III 1.37 (0.40, 0.12, 0.33, 0.31, 0.21); IV 1.91 (0.56, 0.15, 0.53,

0.42, 0.25). Leg formula: 4 1 2 3. Palp measurements: 0.45 (0.15, 0.07, 0.11, 0.12). Chitinous ducts strongly curved backward from the epigastric furrow.

Etymology. – The specific name is from the Latin “ gyrus = ring”, and refers to the shape of chitinous ducts of female.

Figures

Fig. 5. Ouette gyrus, new species: A, carapace of female, dorsal view; B, abdomen of female, ventral view; C, abdomen of female, lateral view; D, vulva, dorsal view; E, chelicerae of male, anterior view; F, bulb, ventral view; G, left palp, prolateral view; H, left palp, retrolateral view. Scale bars: A–C = 0.2 mm, D–H = 0.1 mm.

Fig. 10. Collection localities of Chinese Ochyroceratidae.